Machine for forming coin gauges



G. A. LONG Jan. 4, 1938.

MACHINE FOR FORMING COIN GAUGES Filed May 2'7, 1955 3 Sheets-Sheet l Jan. 4, 1938. G. A. LONG 2,104,620

MACHINE FOR FORMING COIN GAUGES Filed May 27, 1935 3 Sheets-Sheet 2 Jan. 4, was.

5 A. LONG 2,104,620

MACHINE FOR FORMING COIN GAUGES Filed May 27, 1935 3 Sheets-Sheet 3 Patented Jan. 4, 1938 UNITED STATES MACHINE FOR FORMING COIN GAUGES George A. Long, Hartford, Conn assignor to The Gray Telephone Pay Station Company, Hartford, Conn, a corporation of Connecticut Application May 27 1935, Serial No. 23,724

6 Claims.

My invention relates to a method for forming coin gauges adapted for use with coin operated apparatus, and particularly in connection with telephone toll apparatus, the invention also comprising means for practicing such method.

One form of a. device embodying my invention and in the use of which the method of forming coin gauges may be effected and the objects hereinabove set out may be attained is illustrated in the accompanying drawings in which- Figure 1 is a face view of one section of a mold embodying my invention and as denoted by dotted lines of Fig. 2.

Figure 2 is a diagrammatic view presenting an 15 edge of said mold, the mold members separated being shown indotted lines and a section of the cover being broken away.

Figure 3 is a face view of the mold with the guides broken off, the parts being in the dotted line positions of Figure 2.

Figure 4 is a view in section on a plane denoted by the dotted line 4-4 of Fig. 1.

Figure 5 is a view in section, scale enlarged, on a plane denoted by the dotted line 5-5 of Fi 1.

Figure 6 is a perspective isometric View of a bottom forming die for a coin opening.

Figure 7 is a similar view of a die for another coin opening.

Figure 8 is a detail view, scale enlarged, showing the positions of the plungers in the operation of casting a coin gauge, the ends of the plungers being located in the gauge cavity.

Figure 9 is a similar view but illustrating the positions of the plungers withdrawn from said cavity.

Figure 10 is a perspective isometric view illustrating the construction of the plunger slide.

Figure 11 is a face view of a coin gauge formed in the molding operation.

Figure 12'is an end view of the same.

Figure 13 is a top view.

Figure 14 is a bottom view.

Figure 15 is a view in cross section on a plane denoted by the dotted line'|5|5 of Fig. 11.

Figure 16 is a similar view on a plane denoted by the dotted line ||i---|6 of Fig. 11.

Figure 1'7 is another similar View on a plane denoted by the dotted line of Fig. 11.

Figure 18 is a view in section on a plane denoted by the dotted line |8-|8 of Fig. 14.

Figure 19 is a similar view on a plane denoted by the dotted line 9| 9 of Fig. 14.

In the accompanying drawings the numerals |ll|| denote mold members that are composed of any suitable metal, in the arrangement herein shown the member Ill being fixed and the member being movably mounted. The member 10 is increased in thickness at one end, as at I2, this portion having recesses in which bottom forming dies l3 and I4 appurtenant to coin openings in a gauge plate are located, the die M for the twenty-five cent coin opening being shown' in Fig. 5. A hole comprising an ingate is formed through the thinner part of the member 10 for the introduction of molten metal to the mold. The mold member H has a recess l8 formed in that side facing the member ID, this recess being undercut at oppositeedges to receive lips IQ of a dove-tailed shaped slide 26 movably mounted in said recess. The slide has a recess 2| which is closed by a cover 22 as shown in Figs. 1, 4 and 5 of the drawings. An actuating bar 23 is located at the top of the mold opposite the opening to the recess 2|, said bar being engaged at its opposite ends with guide posts 24 extending into guide holes 25 in the edge of the mold member II and slidable therein, and as shown in'Figs. 1 and 4 of the drawings. Actuating rods 26 are secured to the mold member H], projecting therefrom across the edge of the mold member II, and as shown in Fig. 2- of the drawings. The mold member H] 'is secured to and supported by a foundation 2'! which in fact is the stationary plate of a mold casting machine, and the opposite ends of the rods 26 are rigidly secured to a stationary part of the frame of the mold casting machine, such frame not being shown herein.

Plungers 28-29-450 are located in the recess 2| and are connected with the bar 23 by means of slots in the plungers in which the bar is located, pins 3| in each of the plungers projecting through slots in the bar, as shown in Fig. 1 of the drawings to permit lateral movement of the plungers within the recess 2|.

For an understanding of the use of the plungers the article to be produced by the molding mechanism is illustrated in Figs. 11 to 17 of the drawings, such article being a coin gauge comprising a body 32 having flanges 33 and also having coin openings 3435-36 through the front face of the gauge for the reception, respectively, of twenty-five cent, ten cent, and five cent coins. The openings 35-36 terminate in coin slots 3839 with ledges 40-4| extending from the opening in the face of the gauge to the coin slot. The opening 34 extends into a slot 42 located nearer the face of the gauge than are the slots 38-39. A chamber 31 opens from the bottom of the gauge inwardly around the ledges 40-4l and said chamber terminates length wise in a chamber extension 43 located back of and divided from the slot 42 by a back wall 44, and as shown in Figs. 14 and 17 of the drawings A hole 45 extends, from each of the openings 36 through the back of the gauge and asimilar hole 46 extends from the opening 34 through the back wall 44 and through the back of the gauge, as shown in Fig. 17 of the drawings, these holes being for the insertion of an instrument as" a lead pencil for removal of a defectiveor mutilated coin that will not. pass down' the coin slot. The bottoms of the coin openings 3'435-'36 display characters, as numerals 25, 10 and 5, to denote the amount of the coin to be used in connection with each opening. e

A cavity 41 of the general shape of the coin gauge is formed in the lower portion of the mold member II, as shown in' Figs. 1 and 5 of the drawings, this cavity opening at its upper end into the slide recess 2|, the mouth of the cavity being adapted to be closed by the slide 20 and its cover 22 as shown in Fig. 5. 7 A shallow counter part 48 of the cavity is formed in the mold member ID, the bottom forming dies including the die I4 extending into this counterpart.

The plunger 28 appurtenant to the twenty-five cent coin opening has two lips 4950 spaced apart asshown in Figure 10 with holes 5| extending through the lips and the lip 49 having openings in the form of characters 52 to receive characters l6 of like form on the end of the forming die l4 and which project slightly beyond the surface of the lip. to create a depression in the wall 44 of the coin gauge when the-casting takes place. The plungers 29-30 have lips 5354 with the character openings as 10 and 5 therethrough to receive characters IS on the ends of the bottom forming, dies l3 appurtenant to. the coinopenings 35and 36 in the coin gauge and as shown in Fig. '7 illustrating the die for the ten centopening. These characters I 5 project slightly. beyond the back surface of the lips 5354 to createdepressions, as in the form of numerals It and5 in the bottoms of said openings. The lips 53-54 create the slots .38-39 in the coin gauge, and the lips 4950 on the plunger 28 create the slot 42 and the chamber extension 43, respectively.

The holes 45-46 in'the back wall of the gauge are each formed by means of a plug as 55, shown inFig. 5 in connection with the forming die l4, extending from the mold member into the cavity 4'! at a point back of the several lips -53-54 where the plugs project into the cavity. For the formation of the hole 46111 the wall 44 a plug 56 projects from the bottom forming die I4, and as shown in Fig. 5 of the drawings, this plug being located in line with the plug to be located back of the latter is in position forcasting.

The operation of casting a 'coin gauge is as lip 50 when the follows. .As the movable plate 51 of the mold casting machine is moved toward the stationary plate 21 the, plungers traveling down the inclined portion of the rods '26 are shifted so that their lower ends enter the cavity 41, this entry of the lower ends of the plungers into the cavity being completed before the mold parts are as shown in Fig. 8. In this movement of the hole or ingate l1, preferably under pressure,

and in a manner that will be readily understood by thoseskilled in the art, such metal entirely filling the cavity 41 and flowing around the ends of the several plungers and plugs projecting into the cavity.

Afterthe metal-ishardened the mold member H is moved away from the member ID, in the first part of the movement the plungers passing along the straightportions 58 of the actuating rods '26, thereby :removing. the plug 56 from the hole 5| in the lip 49 of the plunger 28. The plungers are now free to be withdrawn by the actionof the inclined portions of the rods 26, the bar 23 traveling upwardly until it encounters lifters 59 attached to and projecting from the mold member H as a means for lifting said bar, and as shown in Figs. 1 and 2 of the drawings. This contact withsaid lifters causes the slide 20 .to be liftedslightly, from theposition shown in to move inwardly, thereby ejecting the coin gauge 32 from the cavity. I v

The slide 2llhas a boss 8| formed on its lower end and pins 62 also project from the lower end of said slide at one side of said boss, the latter be ing for the purpose of forming a depression 53 in the edge ofthe body of the article being cast, and as shown in Figs. 14 and 180i the drawings and the pins 62 create holes 64 in the flanges 33 of said article. The sliding arrangement of the slide-20 provides for the removal of said boss and pins from said opening and holes in order to. permit removal of the cast article from the cavity 41in themold member H.

In accordance with the provisions of the patent statutes I have described the principles of opera tion of my invention, together with the device which I now consider to'represent the best embodiment thereof; but I. desire to have it understood that the device shown is only illustrative and that the. invention may be carried out by other means and appliedtouses other than those above set out.

I claim:

' 1. A casting machine including mold members separably mounted and'having a cavity between them, a slide mounted on a mold member to close the mouth of said cavity, a plunger movable with said slide and also independently thereof into said cavity to form a core, said members including a bottom forming die projecting into said cavity to create an opening in the wall of an article cast therein, and means for withdrawing said plunger and said slide from said cavity.

' 2 A casting machine including mold members separably mounted and having a cavity between them, a slide movably mounted on a mold member to close the mouth of said cavity and having a recess with tapered walls, a plurality of plungers mounted in said recess in contact with said tapered Walls to move the plungers laterally, means for imparting longitudinal movement to said plungers to enter them into said cavity to form a core therein, said members including bottom forming dies appurtenant to each plunger to create openings in the wall of an article cast in said cavity, and means for withdrawing said plungers as the mold members are separated.

3. A casting machine including mold members separably mounted and having a cavity between them, a slide moveably mounted on a mold member to close said cavity and having a recess with tapered walls, plungers movably mounted in said recess in contact with said walls to impart lateral movement to the plungers, means for imparting longitudinal movement to said plungers to enter them into said cavity to form a core therein, stops projecting from said slide to receive said plunger moving means to impart movement to said slide to uncover said cavity, and means to permit separation of said plungers to withdraw them from said cavity as the mold members are separated.

4. A casting machine including mold members separably mounted and having a cavity between them, a slide movably mounted on one of said mold members and having a recess with inclined walls, plungers longitudinally movable in said recess for projection into said cavity and engageable with said inclined walls to impart lateral movement to said plungers, an actuating bar operatively engaged with said plungers, actuating rods engaged with said bar and having inclined portions to impart longitudinal movement to said plungers, and lifters supported by said slide and engageable with said bar for imparting movement to said slide to uncover said cavity.

5. A casting machine including mold members separably mounted, a slide carried by a mold member and having a recess, said mold members and said slide cooperating to form a casting cavity between them, said recess having an inclined wall, a laterally movable plunger mounted for movement with the one of said mold members carrying the slide and having an inclined end corresponding to the inclined wall of said recess to effect lateral movement of said plunger by contact with said inclined wall, and means for withdrawing said plunger from said cavity, said recess being of a width to permit said lateral movement of the plunger as it is withdrawn from the inclined opening in said casting.

6. A casting machine including mold members separably mounted and having a cavity between them, a slide movably mounted on a mold member to close the mouth of said cavity and having a recess with a tapered wall, a plurality of plungers mounted in said recess one of whichis in contact with said tapered wall to permit lateral movement of a plunger, means for imparting longitudinal movement to said plungers to enter them into said cavity to form a core therein, and means for withdrawing said plungers as the mold members are separated.

' GEORGE A. LONG. 

